Improvement in pill-coating machines



UNITED STATES ADOLPHUS F. W.

PATENT QFFICE.

NEYNABER AND WILLIAM F. A. NEYNABER, OF

NEW YORK, N. Y.

IMPROVEMENT IN PILL-COATING MACHINES.

Specification forming part of Letters Patent No. 170,185, dated November23, 1875; application filed October 9, 1875.

Our invention consists in the constructionof a needle-rack with amovable board, which we call the push-board, to be put in a certainposition as a guide for putting pills'on the needles for dipping theminto a solution of gelatine, and also to be used for pushing, off thepills when in the state of drying. after they have been coated bydipping.

I Figure 1 is a horizontal section of the needlerack, showing theposition of the needles. Fig. 2 is a longitudinal section, showing theneedle-rack in the position as used for putting on the pills. Fig. 3 isthe same sectionin the position as used for dipping pills into thesolution of gelatine. Fig. 4 is the same section in the position afterit has been used for pushing off the pills. Fig. 5 is a transversesection of the needle-rack in the position after pills have been pushedoff. I

A is a board of a suitable size. I prefer a board half an inch think,three inches wide,

and fifteen inches long, having any suitable number of holes forneedles. I prefer twentyfive holes in one row, and five of such rows,making one hundred needles on one rack. I preferhaving the holesfive-eighths of an inch apart from each other. Into these holes areputneedles which have been annealed on the upper part by holding theminto a flame, and then bent as shown in Figs. 2, 3, 4, and 5, so thatthey will be held firmly in their places by board B, screwed by means ofscrews D to board A. F F are blocks of proper thickness, to be putbetween the board A and C for the purpose of fixing the height of theneedles projecting through board G when pills are to be put on theneedles. For smaller pills the blocks should be thicker. brass, iron, orany suitable substance, to prevent the board 0 from slipping ofi' theneedles when the pills are pushed off. If new needles have tobe insertedthe screws D D are unscrewed, the board taken out from the side, theneedles put in, and board 0 screwedl again to board A, Fig. 2.- Blocks FF of proper thickness are put between the board A and 0, Fig. 2, and thepills are put on the needles with the fingers. The blocks F F are nowtaken out, board 0 is pressed close to board A, and the pills aredippedinto the coating-solution. (SeeFig. 3,) The pills are then allowedto dry off a little, the board(] is pushed oft'as far as bands E E willallow, the pills drop down, and the hole left by the needle will beclosed by contraction of the g'elatine while in the state of drying.Thus the pills can be coated very quick, and the advantages of thisapparatus are: The simple arrangement, requiring very little trouble ofinserting new needles, and the saving of much labor in the Working ofthe rack, as only one operation of dipping is required, since the pillscan be pushed off Without being injured when the gelatine is quite soft,and thus will close up the orifice while drying.

We claim as our invention- The combination of the needles with boards AB O and bands E for coating pills, substantiallyas and for the purposespecified.

A. F. W. NEYNABER. W. F. A. NEYNABER. Witnesses JACOB A. HATZEL, GEORGEHATZEL.

E E are bands of

